science. it's just common sense. from td ameritrade. so, the 5.3-liter v-8 silverado can tow up to 9,600 pounds? 315 horsepower. what's that in reindeer power? [ laughing ] [ stops laughing ] [ male announcer ] chevy's giving more. this holiday season, trade up to get the 2012 chevy silverado all-star edition for 0% apr financing for 60 months plus $2,000 cash allowance or get a total value of $9,000. >>> welcome back. pandora a story today. the stock sinking after a disappointing earnings outlook. julia boorstin spoke to the company's ceo. she has the story. >> maria, pandora's earnings may have beaten expectations, but all investor ts care about is ty reduced their fourth quarter guidance, projecting an adjusted loss of as much as nine cents per share, sending the stock down as much as 20% earlier today. the ceo warned he expects advertisers to be20%. they expect advertisers to be particularly cautious about spending in january. >> we did reduce guidance. i think it's very prudent because of this unique situation we have in which we're sensitive to the mix of ad spend in january as